diff --git a/applications/SCCM_link.c b/applications/SCCM_link.c
index 62bf311..8d6cb10 100644
--- a/applications/SCCM_link.c
+++ b/applications/SCCM_link.c
@@ -63,29 +63,22 @@ void uart_thread_entry(void *parameter)
             if (!req) continue;
             rt_strncpy(req->input, (const char *)input, sizeof(req->input));
             req->input_len = len;
-            req->sem = rt_malloc(sizeof(struct rt_semaphore));
-            if (!req->sem) {
-                rt_free(req);
-                continue;
-            }
-            rt_sem_init(req->sem, "uart_resp", 0, RT_IPC_FLAG_FIFO);
 
             // 发送到处理线程
-            if (rt_mq_send(proc_mq, &req, sizeof(req)) == RT_EOK)
+            if (rt_mq_send(request_mq, &req, sizeof(req)) == RT_EOK)
             {
                 // 等待处理完成
-                if (rt_sem_take(req->sem, rt_tick_from_millisecond(100)) >= RT_EOK)
+                if (rt_mq_recv(response_mq, &req, sizeof(req), 500) >= RT_EOK)
                 {
                     if(req->output_len>0) rs485_send(hinst, req->output, req->output_len);
                 }
             }
             // 清理
-            rt_sem_detach(req->sem);  // 或 rt_sem_delete
-            rt_free(req->sem);
             rt_free(req);
         }
     }
 }
+
 extern struct rt_memheap sram_DTCMRAM;
 static struct rt_thread dat_uart_thread;
 static void *dat_uart_stack __attribute__((aligned(4)))= RT_NULL ;
diff --git a/applications/data/DATA_comm.c b/applications/data/DATA_comm.c
index 909d091..9dce2b7 100644
--- a/applications/data/DATA_comm.c
+++ b/applications/data/DATA_comm.c
@@ -24,8 +24,8 @@
 #define DBG_LVL DBG_LOG
 #include <rtdbg.h>
 
-rt_mq_t proc_mq;
-//static struct proc_request *req;
+struct rt_messagequeue *request_mq;   // UART → Proc
+struct rt_messagequeue *response_mq;  // Proc → UART
 
 char cjson_falg=0;//是否解析cjson
 char *json_buffer=NULL;//
@@ -535,7 +535,7 @@ void proc_thread_entry(void *parameter)
     while (1)
     {
         // 接收请求指针
-        if (rt_mq_recv(proc_mq, &req, sizeof(req), RT_WAITING_FOREVER) >= RT_EOK)
+        if (rt_mq_recv(request_mq, &req, sizeof(req), RT_WAITING_FOREVER) >= RT_EOK)
         {
             if (!req) continue;
             memcpy(DATA_api,req->input,5);
@@ -565,11 +565,8 @@ void proc_thread_entry(void *parameter)
             {
                 req->input[i]=0;
             }
-            // 通知 UART 线程可以发送了
-            if (req->sem)
-            {
-                rt_sem_release(req->sem);
-            }
+            // 发送到 UART 线程
+            rt_mq_send(response_mq, &req, sizeof(req));
         }
     }
 }
@@ -580,8 +577,9 @@ static void *dat_comm_stack __attribute__((aligned(4)))= RT_NULL ;
 int data_comm_init(void)
 {
     rt_err_t dat_err;
-    proc_mq = rt_mq_create("proc_mq", sizeof(struct proc_request*), 5, RT_IPC_FLAG_FIFO);
-    if (proc_mq == RT_NULL)
+    request_mq = rt_mq_create("request_mq", sizeof(struct proc_request*), 5, RT_IPC_FLAG_FIFO);
+    response_mq = rt_mq_create("response_mq", sizeof(struct proc_request*), 5, RT_IPC_FLAG_FIFO);
+    if ((request_mq == RT_NULL) || (response_mq ==RT_NULL))
     {
         LOG_E("Failed to create message queue!\n");
         return -1;
diff --git a/applications/data/DATA_comm.h b/applications/data/DATA_comm.h
index 41edfe6..370396b 100644
--- a/applications/data/DATA_comm.h
+++ b/applications/data/DATA_comm.h
@@ -20,11 +20,11 @@ struct proc_request {
     int  input_len;
     char output[MAX_OUTPUT_LEN];
     int  output_len;
-    struct rt_semaphore *sem;  // 指向动态分配的信号量
 };
 
-// 消息队列（供外部使用）
-extern rt_mq_t proc_mq;
+// 双消息队列声明
+extern struct rt_messagequeue *request_mq;   // UART → Proc
+extern struct rt_messagequeue *response_mq;  // Proc → UART
 
 int data_comm_init(void);
 
diff --git a/applications/sql/DB_SQLite.c b/applications/sql/DB_SQLite.c
index 4270be1..12b47ec 100644
--- a/applications/sql/DB_SQLite.c
+++ b/applications/sql/DB_SQLite.c
@@ -276,6 +276,8 @@ static void db_sqlite(void *parameter) {
     // 默认启用数据库
     db_enabled = RT_TRUE;
     static rt_bool_t  first_wait_done = RT_FALSE;
+    //连续链接次数
+    rt_int16_t op_link=0;
     while (1)
     {
         // 接收命令
@@ -284,12 +286,23 @@ static void db_sqlite(void *parameter) {
             if (first_wait_done)
             {
                 first_wait_done = RT_FALSE;
-                //sqlite3_exec(g_db, "PRAGMA shrink_memory;", 0, 0, 0);
+                sqlite3_exec(g_db, "PRAGMA shrink_memory;", 0, 0, 0);
                 sqlite3_close(g_db);
                 g_db=RT_NULL;
+                op_link=0;
             }
             continue;
-        }else{first_wait_done = RT_TRUE;}
+        }else{
+            if(op_link>1000)
+            {//连续操作数据库1000次后强制关闭防止内存占用
+                sqlite3_close(g_db);
+                g_db=RT_NULL;
+                op_link=0;
+            }
+            op_link++;
+
+            first_wait_done = RT_TRUE;
+        }
 
         //检查排队超时
         rt_tick_t now = rt_tick_get();
@@ -328,8 +341,8 @@ static void db_sqlite(void *parameter) {
                 return_disabled(&cmd);
                 continue;
             } else {
-                //限制缓存大小 (100KB)
-                //sqlite3_exec(g_db, "PRAGMA cache_size = -50;", 0, 0, 0);
+                //限制缓存大小 (KB)
+                sqlite3_exec(g_db, "PRAGMA cache_size = 8;", 0, 0, 0);
                 //设置临时存储为文件模式 (节省内存)
                 //sqlite3_exec(g_db, "PRAGMA temp_store = FILE;", 0, 0, 0);
                 //rt_kprintf("Opened database: %s\n", DB_NAME);